Nozzle for feeding fine fuel to furnaces.



No. 639,437. Patented Dec. l9,l 899.

C. A. Roamsou.

NOZZLE FOR FEEDING FINE FUEL T0 FURNACES.

(Application fllea Aug. 29, 1899.) (No Model.) 2 sneetks'hm No. 639,437. PatentedDec. l9, I899.

C. A. ROBINSON.

NOZZLE FOR FEEDING FINE FUEL TD FURNACES.

(Application filed Aug. 29, 1899.) (No Model.) 2 Sheets$heet 2.

m5 "ohms PETERS c0. FNOTO-LITHO, WASHINGTON, n c

liwrrnn dramas Prrrnnr CHARLES A. ROBINSON, OF IIEMPSTEAD, NEW YORK, ASSIGNOR TO THE IDEAL FUEL FEEDER COMPANY, OF SAME PLACE.

NOZZLE FOR FEEDING FINE FUEL TO FURNACES.

SPECIFICATION forming part of Letters Patent N 0. 639,437, dated December 19, 1899.

Application filed August 29, 1899. Serial No. 728,881. (No model.)

To all whom it may concern:

Be it known that I, CHARLES A. ROBINSON, a citizen of the United States, residing at Hempstead, in the county of Nassau and State of New York, have invented certain new and useful Improvements in Nozzles for Feeding Fine Fuel to Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improvement in twyers or nozzles for feeding finely-divided fuel to furnaces; and it consists in the novel features hereinafter described.

In the accompanying drawings I have illustrated one form in which I have contemplated embodying my invention, and my invention is fully disclosed in the following description and claims.

Referring to the said drawings, Figure 1 represents a perspective View of my improved.

twyer' or nozzle, taken from the end outside of the furnace. Fig. 2 is a perspective view of the twyer or nozzle, taken from the end which projects into the fire-box or combustion-chamber. Fig. 3 is a central vertical sectional view of the device, showing it provided with two sets of horizontally-disposed deflectors. Fig. 4 representsahorizontal sectional View of the twyer or nozzle, a portion being broken away.

In feeding finely-divided fuel to furnaces with and by means of a blast or current of air it is extremely difficult to secure a perfectly-even distribution of the fine fuel as it leaves the twyer or discharge-nozzle, owing to the fact that the fuel being heavier than the current of air has a tendency to settle or precipitate before itfleaves the nozzle. It is also difficult to secure exactly the required quantity of air to effect a perfect and smokeless combustion of the fine fuel and to regulate the air-supply accurately in proportion to the amount of fuel being fed.

The object of my invention is to overcome these difficulties by remixing the ainand fuel immediately before it leaves the nozzle or twyer, to distribute the fuel evenly throughout the entire width of the furnace or combustion-chamber, to regulate the air-supply so that it will at all times be in proper proportion to the amount of fuel being fed, and also to retard the discharge of fuel and air from the nozzle, so that the flame produced within the combustion-chamber or fire-box will travel more slowly therethrough, and thereby impart its heat more fully to the boiler than it would if discharged at the initial velocity of the air blast or current.

In the drawings, in which I have illustrated one form of twyer or nozzle embodying my invention, A represents the shell or main body of myimproved twyer, which may be formed of sheet or cast metal in one single piece, as shown in the drawings, or in several pieces suitably united, as may be found most desirable and convenient. This shell or main body is rectangular in cross-section and is narrowed vertically and expanded laterally from the outside end to the inside end, as shown.

The outer end or walla of the shell or main body is provided centrally with a neck u, having a passage therethrough, in this instance rectangular in cross-section, to which is connected the pipe or chute for supplying the air and fine fuel. Above this neck a the said wall a is provided with a horizontal opening a and a similar opening a is provided below the neck a.

The lateral walls or cheeks a a of the shell are provided with large air-inlet openings a (i which are adapted to be partially or wholly closed by adjustable closing-plates or dampers B B, the positions of which can be regulated by means of a suitable clamping-screw or similar device. In the present instance I have shown each of the side faces a provided with a central portion at, extending across the aperture a and provided with a slot ad, which is engaged by a sliding clampingbolt 1), which also passes through the closing-plate B and is provided with a clamping-nut, a wingnut being shown. By loosening this nut the plate B may be moved so as to close more or less the opening 0L and thereby regulate the admission of air into the nozzle and so into the combustion-chamber.

The outer end or walla of the shell or main body is provided at each end of the lower aperture a with a bearing or socket c, in which is mounted a supporting-shaft G, extending across the aperture and secured in said bearings by set-screws 0. Upon the shaft 0 is mounted one or more horizontally-disposed deflecting-plates capable of angular adjustment upon the shaft 0. I may use a single plate or any number; but I prefer to employ three plates, as shown and indicated by D D D Each of these plates is pivotally and adjustably connected to the shaft 0, and I prefer to secure each plate by riveting or otherwise to a sleeve or collar D, surrounding the shaft 0 and provided with a set-screw cl for securing it in its adjusted positions. I also prefer to form the central plate D with parallel lateral edges and to make the outer lateral edges d d of the outer plates I) D inclined to correspond to the inclination of the lateral faces or cheeks c a of the shell or main body, as clearly shown in Fig. l. The deflecting-plates D D D are of such length that they can be turned up into the path of the current of air and fuel passing through the neck a and independently adjusted, so as to deflect it upward toward the upper wall a of the shell or main body.

The opening a above the neck a may be left unobstructed as an air-opening, or I may provide the exact duplicates of the independently-adj ustable deflecting-plates D D D and connected parts above the neck a, as shown in Fig. 3, so that the current of air and fuel may be deflected downward toward the .bottom plate a of the shell or main body, if found necessary or desirable. It will of course be obvious that if any of these plates are not needed they can simply be turned parallel with the adjacent upper or lower wall of the main body and will then have no effect upon the air and fuel. It will also be observed that air is permitted to enter through the openings 0, a to mingle with the fuel and assist in producing a perfect combustion of the same.

I also provide at and adjacent to the inner end of the twyer or nozzle adjustable devices for securing the proper mixture and lateral distribution of the air and fuel and for retarding the discharge of the air and fuel to reduce the velocity of the flame and products of combustion in their passage through the furnace. These devices consist of aplurality of vertically-disposed plates arranged angularly with respect to the longitudinal axis of the nozzle. I prefer to provide two rows or series of these vertically-disposed retarding and spreading plates, one series adjacent to the bottom plate a and the other adjacent to the upper plate a of the nozzle, each plate of one series being disposed angular-1y to the corresponding plate of the other series. In the drawings I have shown four plates in each series; but I do not limit myself to any particular number, nor do I limit myself to the exact arrangement of said plates herein shown and described. In the present instance the bottom plate a is provided with four vertically-disposed plates E E E E each of which is provided at its lower edge with a lateral flange E, pivoted to the bottom plate a at c. Adjacent to each of said plates the bottom plate a" of the nozzle is provided with a curved slot a and each of the flanges E is provided with a clamping bolt' 6, passing through one of said slots a and through the flange E and provided with a nut c By this means these plates may be swung on their pivots e to their desired positions and clamped rigidly in position by the bolts 6 and nuts 6 I prefer to arrange the central plates E E so that they converge slightly and the plates E and E to diverge from their adjacent plates E and E respectively, as shown in full lines in Fig. 4. The upper plate a is provided with four vertically-disposed plates F F 11' F constructed exactlylike the plates E, 620., having flanges F, pivoted at f and provided with clamping-bolts f and nuts f said bolts passing through curved slots (Win the upper plate a The lower edges of the plates F, &c., are in substantially the same plane as the upper edges of the plates E, &c., and each of plates I F F F is disposed at an angle opposite to that of the corresponding plate beneath it, as indicated in dotted lines in Fig. 4, and also clearly shown in Figs. 1 and 2. The two central plates F F will therefore diverge, while the plates F F and F F Will converge. The arrangement of the plates of the two horizontal series at different angles, as shown and described, enables these plates to cooperate with the horizontally-disposed deflectors D D D as by adjusting the latter to throw the material up ordown or partly up and partly down different results in the lateral distribution of the material are obtained and the desired even and uniform discharge of the material can be accurately obtained. It will also be seen that in passing the spreading and retarding plates the air and fuel will be retarded just prior to their delivery from the nozzle, thus causing the flame within the combustion chamber to travel more slowly and enabling it to give off its intense heat more fully to the boiler. The apertures a a will allow a considerable amount of air to enter the nozzle and unite with the current of air and fuel, and the lateral adjustable openings a a will also supply a large volume of air, so that the proper amount for producing complete and smokeless combustion of the fuel can be obtained.

The shell ormain body A is also provided with an outwardly-extending flange A, perpendicular to the longitudinal axis of the nozzle, by means of which it is secured to the furnace. I preferably form an aperture in the ordinary fire-door, through which the inner end of the nozzle is inserted until the said flange A abuts against the door, and the nozzle is secured in position by bolting the said flange to the door, the bolts passing through bolt-holes A formed in said flange.

I do not limit myself to the exact details of construction herein shown, as slight variations maybe made therein without departing from the spirit of my invention.

What I claim, and desire to secure by Letters Patent, is-

1. In a nozzle for feeding fine fuel to furnaces, the combination with the hollow main body, of a series of independent, verticallyadjustable deflectors, extending transversely of the main body, each adapted to be moved into the path of the current of air and fuel, substantially as described.

2. In a nozzle for feeding fine fuel to furnaces, the combination with the hollow main body having a passage therethrough for the passage of a current of air and fuel, of a horizontal series of vertically-movable deflectors pivoted to said main body, and independent securing devices, for each of said deflectors, substantially as described.

3. In a nozzle for feeding fine fuel to furnaces, the combination with the hollow main body having a passage therethrough for the passage of air and fuel, a transverse shaft extending transversely of said main body, a series of independently-movable deflectors pivotally mounted on said shaft, and independent devices for holding said deflectors in fixed relation with said shaft, substantially as de scribed.

4. In a nozzle for feeding fine fuel to furnaces, the combination with the hollow main body, of a series of vertically-disposed spreading and retarding plates located within said main body adjacent to the delivery end thereof, said plates being separated from each other throughout their length to permit the fuel to pass between them, and independent adjusting devices for each of said plates, for adj usting them laterally, substantially as described.

5. In a nozzle for feeding flne fuel to furnaces, the combination with the hollow main body, of a verticallydisposed, laterally-adjustable spreading and retarding plate located in said main body adjacent to the delivery end thereof and devices for securing said plate rigidly in its adjusted position, substantially as described.

6. In a nozzle, for feeding fine fuel to furnaces, the combination with the hollow main body, of a vertically-disposed spreading and retarding plate located in said main body adjacent to the delivery end thereof and pivotally secured to said main body, and a securing device for holding said plate rigidly to the main body in its adjusted position, substantially as described.

7. In a nozzle for feeding fine fuel to furnaces, the combination with the main body, of a series of vertically-disposed spreading and retarding plates located adjacent to the delivery end of said main body, a second series of said plates located above those of the first series, each plate of each series being disposed at an angle to the adjacent plate of the other series, substantially as described.

8. In a nozzle for feeding fine fuel to furnaces, the combination with the main body,

of a series of vertically-disposed spreading and retarding plates located adjacent to the delivery end of said main body, a second series of said plates located above those of the first series, and independent adjusting devices connected With each of said plates, substantially as described.

9. In a nozzle for feeding fine fuel to furnaces, the combination with the main body, of a series of vertically-disposed spreading and retarding plates located adjacent to the delivery end of said main body, a second series of said plates located above those of the first series, each plate of each series being disposed at an angle to the adjacent plate of the other series, and a horizontally disposed, vertically-adjustable deflector located adjacent to the outer ends of said vertical plates, substantially as described.

10. In a nozzle for feeding fine fuel to furnaces, the combination with the hollow main body provided with an inlet-opening and a discharge-opening, of ahorizontally-disposed vertically adjustable deflector adjacent to said inlet opening, a vertically disposed spreading and deflecting plate adjacent to the discharge-opening of said main body and a vertically-disposed spreading and deflecting plate above and at an angle to said firstmentioned plate, substantially as described.

11. In a nozzle for feeding fine fuel to fur naces, the combination with the main body having an inlet and a discharge opening, a horizontallydisposed verticallyadjustable deflector above and below said inlet-opening, a horizontal series of vertically disposed spreading and retarding plates adjacent to the discharge-opening of the nozzle, a second series of said vertical spreading and retarding plates above those of the first-mentioned series, each plate of the upper series being disposed at an angle to the corresponding plate of the lower series,and independent adj usting devices for laterally adjusting each of said plates, substantially as described.

12. In a nozzle for feeding fine fuel to furnaces, the combination with the main body having an inlet and a discharge opening, a horizontally disposed, vertically adjustable deflector above and below said inlet-opening, and a series of vertically-disposed spreading and retarding plates adjacent to the dischargeopening of the nozzle, substantially as described.

In testimony whereof I affiX my signature in the presence of two Witnesses.

CHARLES A. ROBINSON. lVitnesses:

GEO. W. WEEKEs, H. W. VANDERVOORT. 

